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Discussion in ' Materials ' started by Mission BoatJul 15, Log in or Sign up. Boat Design Net. I thought that this would not be that difficult a task, but silly me. None to be. I am ready to by non-galvanized or zinc plated and have them galvanized at our local galvanizer. Can anyone boat building wood screws group a source for quality screws of this nature, either galvanized or not? Thanks in advance for any guidance.

Mission BoatJul 15, RedskyJul 15, Charlie there went the extra mile to find galvanized for me, but without luck. I may try them again for plain steel, if I have to go that boat building wood screws group. How about stainless screws?

DeemanJul 15, Deeman, thanks for the lead, but I need to stick with galvanized. We won't be pulling them during refastening, so I need to stick with as similar a metal as possible. SamSamJul 16, Sam2 -- Tks for the comments and suggestions. Since the old fastenings galvanized boat nails of 50 years ago have deteriorated to the point that we cannot extract boat building wood screws group, we will be refastening in new holes in close proximity.

Using silicon bronze would add too many dissimilar metals to the soup. Mission BoatJul 20, RedskyJul 21, Sean B. I understand about dissimilar metals and corrosion.

Can someone tell me though whether this is really a concern on a wood boat given that the screws won't be coming into contact with each other? Is the problem that the wood has enough moisture contact to conduct electrons? Is that the problem? When I was building some patio furniture, I found some epoxy-coated screws.

It was an interesting idea, I thought, but I don't know how well they would work at preventing corrosion. My gut instinct tells me you'd still get corrosion in whatever places the epoxy coating chips or gets nicked.

Is that correct? Finally, why can't you take some "easy outs" I know I know, they're not easy at all Seems that would be the best way to do it. And that way, you could use whatever types of nails you wanted.

I can imagine the electrolytic action corroding metal screws within a half an inch or an inch of each other Can anybody comment on this? I'm a pirate of the internets! TootJul 24, The guy who boat building wood screws group my stuff says it boat building wood screws group universally accepted among the restorers he knows, to get the iron fasteners out of old wooden boats.

He lists this as the biggest problem found, usually. He calls it iron sickness and it affects the wood, not just a rotten fastener and its hole. He is also animated about not mixing fastener material types. I went through this same discussion when doing my Chris Craft, thinking I could save some money with stainless which he thinks even less of then galvanized or maybe some galvanized fasteners.

He indicated stainless is useless if placed under water or in wet wood, rusting almost boat building wood screws group fast as a bright finished common nail. He laughed hard at the idea of drywall screws and showed me how truly weak, easily broken and quick to rust they are. He uses them in jigs and temporary setups and they clearly do not last very long exposed to weather, let alone in harsher marine life.

A fastener used under the waterline, will be in direct contact with the other fasteners, by way of the water and this is what causes dissimilar metals to corrode.

He said it makes the boat a battery, the water is the electrolyte and the fasteners are anodes or cathodes depending on what they are made of, if I remember the conversations correctly. So a bronze fastener, placed several feet from a steel one will boat building wood screws group suffer the same corrosion, if in contact with wet wood or under the water.

In the end the comment, you have to use bronze with bronze, galvanized with galvanized or replace the galvanized completely with bronze, is what I remember. I saw several examples of removed, dead screws and pieces of wood that had been replaced, where the old galvanized screws or nails had wasted away.

Bronze fasteners that had become dust in their holes or severely weakened wood in the area of a rusted old galvanized fastener, unable to boat building wood screws group a replacement screw or nail from the boat building wood screws group to the wood. I also saw 45 year old bronze boat building wood screws group removed from my boat that looked pretty good after years on a mooring and was grateful Chris Craft choose to use this material, instead boat building wood screws group galvanized.

Sorry about the long post. Hunter25Jul 25, RedskyJul 25, A proper boat wood screw is quite different then the average screw. All wood screws are now a rolled thread. A real boat screw is a cut thread screw which has a shank diameter the same as the thread, meaning it will permit the wet wood to swell tight against it, sealing Wooden Boat Building Tasmania 10 the hole, if properly installed.

A rolled thread screw requires a larger clearance hole, because the threads stand proud of the shank, which is to big for normal swelling to seal the hole. Drywall screws are dainty shank things that haven't any business on a boat. The bugle head doesn't seal well and I have never seen a proper shaped counter sink that will permit them to seal. The bugle head was designed to squish the paper in drywall without tearing it.

A real counter sink head provides the most pressure a screw can provide. I'm not sure what you do not like about the normal wood screw thread pattern, but they have much better holding power then the very aggressive drywall screw style thread. The black phosphorus or coated mild steel used in deck and drywall screws will not survive long in marine life.

Galvanizing a weak fastener, just does not make much sense to me. I replaced several thousand screws on the planking of my Chris and the price at times ticked me off, but they are equal or better in quality then the nearly 50 year old ones they replaced.

Is this an area you think wise to economize? Log onto www. They come in square drive, plus the other drive styles. More importantly you will see the difference between a cut screw and a rolled screw, which can make a huge difference in sealing up an old wooden boat. Hunter25Jul 26, RedskyJul 26, You may not find. I have a different problem but the same need for HDGs. Glen-L has "some" boat building wood screws group not a big selection as they are discontinueing stocking.

For this reason alone they are turning to other coatings. You must log in or sign up to reply. Show Ignored Content. Similar Threads. Bolts for Steel Keel - Bronze? Hot Dipped Galvanized? Jeff in BostonFeb 24,in forum: Materials. Replies: 23 Views: Jeff in Boston Feb 27, Boat building wood screws group bolts underwater goodwilltoallJan 7,in forum: Materials. Replies: 9 Views: 4, MikeJohns Mar 6, Waterproof membrane with marine plywood boat?

Replies: 6 Views: Rumars Mar 28, at PM. Type of wood and suppliers of timber for supports in Australia? Replies: 21 Views: Comparison of bending abilites of plywood by species and thckness jpazzzFeb 24,in forum: Materials. Replies: 2 Views: Barry Feb 24, Squidly-DiddlyFeb 8,in forum: Materials. Replies: 31 Views:

Main points:

I'm really tender which we can do a single of these work. It's all a time most appropriate to operate great peculiarity sea class plywood as well as it does need to be scrupulously hermetic with glue. If we find yourself constructing this vessel greatfully send me the sketch of a outcomes.

If we have been starting to erect the wooden trimaran sailboat afterwards go for a vessel we essentially need? Bleach: Operate the comparative measure of 1 boat building wood screws group of whiten to 1 gallon of H2O .

Highest quality marine grade wood screws, carriage bolts, machine screws, keel bolts, and more in both stainless steel and silicon bronze for the boat building professional. Silicon bronze fasteners are primarily used for marine boatbuilding, although many people appreciate the look they can provide with Western Red Cedar or Redwood because the screws will eventually blend into the color of the wood. Silicon bronze screws provide excellent corrosion resistance but are soft and require a carefully sized pilot hole to avoid breakage. Silicon bronze is the best for a marine environment. Our screws are "full body, wood screws"; this is an important distinction. Many "wood screws" sold today are, in fact, sheet metal screws. The shank above the threads on a wood screw is the same size as the outside dimension of the threads.

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